Latching means for dumb-waiter doors



July 7, 1931- FRIED 1,813,734

LATCHING MEANS FOR DUMB WAITER OORS Filed June 20, 1929 3 Sheets-Sheet 1 7111111lllllrllll'Ill11111fIll/1111111III/111111111111,Ill

I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ATTORN'EYs I. FRIED LATCHING MEANS FOR DUMB WAITER DOORS July 7, 1931;

Filed June 20, 1929j 3 Sheets-Sheet 2 INVENTOR Is'ulore I'ieci ATTORN EY July 7, 1931. FRIED 'LATCHING MEANS FOR DUMB WAITER DOORS Filed Ju'ne 20, 1929 3 sheets-sheet a lNvENToR Iszdore'wc BY ATroRNEYs Patented July 7, 1931 IP ATEN T O F FIJCE ISIDGRE FBIED, OF NEW .YOBKFNZ Y.

vLA-'JJCHIING FOR DUIB-WITER DOOBS i Appnanon med Inne 20,

This invention' relates to a dumb-waiter door latc'hing means.

'The principal Jobject of the invention is the pro'v'ision of means of the indicated Character, 1 which 'is designed and adapted to normally retain fall -of the doors vof a dumb wai'ter shaft closed against being opened by the tenants of the apartments of an apartment house or dwe'lling, tb'ut which doors maybe 'selectiv'ely I' un-latched by the j'anitor or superintendent at his 'station in the basement, to bring about the 'proper -use of 'the dumb-waiter for any of its numerous purposes.

Some of the other objects of 'the invent'ion are the .provision 'of means of lthe 'indicated Character which will be easy 'to install, which will be re'li'able in operation, and which may be readily repaired Whenever the foc'casion arises.

With the foregoing and other objects in view, the invention resides in the particular provision, 'relative disposiftionand operation of the parts hereinafter fully described and ill'ust-rated in the accompa'nying drawin s, in which igure 1.1 is a Vertical section of a dumbwai'ter shaft equipped with the Vlatching means of the present invention, ;portions of the shaft and said means being broken away.

Fi'g` 2 is an en'larged horizontal sectional view 'taken on 'the lineiQ- of Fig. 1.

3 is an 'enlarged horizontal sectional view 'taken on the line 3-3 of Fig. 1.

Fig. 4 shows the double latch which 'controls two doors.

Fig. 5 is an enlarged Vertical section through the lower part of the -casing ,of the l'atch means, 'andincludin'g the latch for the door of the first `'floor apartment.

Fig. -6 is an enlarged 'horizontal section taken on the line 6--6 'of Fig. 5.

`7 'is a Vertical section, the 'section bei'n'g indicafte'd by the line 7-7 'of Fig. '6.

Fig. 8 is an 'enlar'g'ed ho'rizontal taken m 'the line 8-8 of ng. '5.

1929. Serial Ro. 372,481.

Fig. 9i's afvertical section, the section .being indicated by the line `9---9 of Fig. l8.

Fi'g. .10 is a detail section taken =on 'the line 1o-1o :of ang. V9.

Fig. 11 is .a persp'ective view of one of the :w single latch elements.

Fig's. 12 and 13 are plan views of Vthe latch e'lementsof the double `latch. v

It fis to be understood that Athe iinve'ntion willfbe designed and adapted for latching and unlatching any number of doors of .a dumbwailtershaft, the number of doors depending upon the number of apartments which cornmunicat'e with ,the 'interior of the dumbwaite'r Is'h'aft, whether there be one or two 6G apartments at each fioor which -communicat'es with the -dumb-waiter s'haft.

The i-llnstrated embodiment of the invention is by way of exam le only. It will be a'p-parent that there is s own va dumb-waiter a shaft 10 which extends from the basement to the uppermost apartment. In the present instance the-re are two doors 11 affording access to the interior of the shaft 10 by two tenants of the top floor, whereas there is one .76 door 11 afording access to the interior of the shaft 10 by the tenants of the remaining lower 'floors Each of 'the doors 11 has a keeper 12 'secured to the inside thereof. The latch means which cooper-ates with the keep- 75 ers 12 is of unitary form and is arranged comp'letely within the shaft 10 in one corner thereof.

The said latching means includes a vsectional tubular casing 13 consisting of sections 14, Sections which interpose the Sections 14, and a lower section 16. The Sections 14 'are detachably connected between the Sections 15 by any 'Practical means, such las by the pro- 'vision 'of bayonet slots 17 in the opposite ends 'of each section 14 and pins 18 onfthe adj'acentend's of two of the Sections 1-5 which enter 'the slots 17. lt will therefore be understood 'thatiby limparting turning movement each section 11-5, such seotlon may 'be `weekly do' W tachcd. The casing 13 supported in any suitable manner such as by the use of attachments 19 secured to the wall of the shaft 10. The lowermost section of the casing being supported against downward movement by the lowermost attachment 19, while the remaining sections 15 are loosely held in position by the remaining attachments 19, so that they may be moved whenever desired tor the purpose of detaching the sections lat. The sections ll are disposed adjacent the doors 11, and the lowermost section 1G is disposed adjacent an opening in the wall portion of the sha'l't in the basement. Each of the sections lt with the exception of the uppermost section ll has arrang'ed therein an element 20 consisting' of a cross sectionally round tubulai` member 21, latch member 22 formed intearal with the member 21 and a member 23 also formed integral with the member 21. bolt 2t extends through the member 21 and through holes arrang'ed diametrieally opposite each other in the section ll. A nut 25 is applied to one end of the bolt 24 to hold the same against axial moi'ement. The bolt 2-12 ser'fes as an axis for the element 20. The section l-l has a slot 26 therein which enables the lateh member to be mored to the latehing' and unlatching positions. The lateh member 22 is moyable into and out of engagement with the lcecper 12 on the related door 1:1. The element 20 is under the influence ot a contractile springT 27 which has one end thereof connected at 28 with a transi'erse partition torining a part of the section 14, and the opposite end ot said spring is connected by links 30 with the eye 31 on the lateh member The spring 27 has anormal tendcncy to moro the element 20 to a position in which its lateh member will engage the related lceper 12. Movement ot the element 20 is accomplished by the employment of a ilexible element which may be in the form ot a stout cord, chain or 'able In the present instance use is made of a cable 32 which has one end thcreot connected as at with the member 22-1, and the lower end thereof is connected as at ;llwith a retaining element arranged extcriorly of the lower section 16. .lt will he apparent that the cable 31 extends within the casino; 13 and has guided moremc-nt over small grooi'ed rollers 33 supported by the partitions 29 ot the casing Sections. The element 3:3 pivotally mounted as at 37 so as: to be swung downwardly to impart movement to the elemet 20 against the action ot the spring 2? to disengage the lateh member 22 from the related lreeper 12. The element 335 will be held in the down position ag'ainst beingr inoi'ed upwardly by the action ot' the spring`l 27 by reason ot' its angular disposition. when it is in the down position, and due to the weight of the element 35. The element 20 is released to the action of its spring :27 when the janitor or superintendent imparts upward movement to the element 35.

In this manner each door may be latched against being opencd by a tenant. It is to bo understood that each door 11 is hingedly mounted and opens inwardly of the apartmcnt. It is also to be understood that suitable identiication marlcs may be placed on the elements to correspond to the different apartments.

The two uppel'most doors 11 which are arranged opposite each other are Controlled by a double lateh. This double lateh is disclosed most clearly in Figs. 3 and f. The lateh elements 20 ot this double lateh are mounted on the same bolt 24- for pivotal movement. The. lateh members 22 extend relatively in opposite directions, one of the members being considerahly longer than the other in order to reach across the shatt. The members 23 are connected with the same lef'zible element 32 by link connections 38. It will thereforc be understood that by manipulating the element 3:3 ot this double lateh, both lateh members X '71 l i win ee moved simultaneously to the latehng' and unlatehing positions. Consequently it will be possible to lateh and unlatch the two uppermost doors 11 simultaneously.

I claim:

1. In combination with a dumb-waiter shaft having doors at different levels, lateh means for each of the doors, and actuating means located at the bottom of said shaft for each lateh means and operatively connected therewith to actuate the same to lateh and unlatch the related door.

2. In combination with a dumb-waiter shat having doors at ditl'erent levels, lateh means for each of said doors and adapted to normally lateh the door, and actuating means located at the bottom of said shaft for each lateh means and operatively connected therewith to actuate the latter to unlatch the related door.

In combination with a dumb-waiter shaft having doors atording access to the interior of the shaft and each beine' mounted to swing outwardly, a keeper on the inside of each door, a support cxtending vertically within said shatt, a lateh device positioned on said support for each keeper to eooperate therewith to lateh the related door, and means positioncd on the lower end of said support for each lateh device to operate it to unlatch the door.

4. In combination with a dumb-waiter shaft havingr doors afi'ording access to the interior of the shaft, a keeper on the inside of each door, a spring actuated lateh device positioned within said shaft for each keeper and normally in engagement with said keeper to lateh the door, and means located at the bottom of said shaft for each lateh device and operatively connected therewith to operate the same to unlatch the door.

5. In combination with a dumb-waiter shaft having doors arranged opposite each other afl'ording access to the interior of the shaft, latch means positioned within said shaft and adapted to latch said doors, and means located at the bottom of said shaft operatively connected with said latch means to operate it to latch and unlatch said doors.

6. In combination with a dumb-waiter shaft having doors afl'ording access to the interior of the shaft, a. keeper on the inside of each door, a pivoted latch member positioned within said shaft for each keeper, yieldable means acting on each latch member which retains the latch member` engaged with the keeper to latch the door closed, and means located at the bottom of said shaft for each latch member and operatively connected therewith to retract the latch member from engagement with its keeper to unlatch the door.

7. In combination with a dumb-waiter shaft having doors affording access to the interior of the shaft, a keeper on the inside of each door, a pivoted latch member positioned within said shaft for each keeper, yieldable means acting on each latch member which retains the latch member engaged with the keeper to latch the door closed, and means located at the bottom of said shaft for each latch member and operatively connected therewith to retract and to retain the latch member from engagement with its keeper to unlatch the door.

8. In combination with a dumb-waiter shaft having doors afording access to the interior of the shaft, a keeper on the inside of each door, a tubular casing positioned within said shaft, said casing consisting of Sections certain of which are detachable, the detachable Sections being positioned respectively adjacent said doors, a latch device on each of said detachable Sections normally adapted to engage the keeper of the adj acent door, a manipulator for each latch device positioned on the lowermost section of said casing, and a flexible element connecting said manipulator with its related latch and having gnided movement within said casing to operate the latch device in response to the manipulation of the manipulator, for the purpose of latching and unlatching the related door.

9. A latching device comprising a tubular casing, spring actuated' latches positioned within said casing at different points intermediate the opposite ends thereof, and means on one end of the casing for each of said latches operatively connected therewith, to move the latch to a latching position, there being a slot in the casing through which the latch may project, the latch being sufliciently long to project through said slot.

10. A latching device comprising a tubular casing consisting of Sections, said sections having provision whereby the sections may be detached from each other, spring actuated latches operatively positioned within certain of said Sections, and means on one of the end Sections for each of said latches operatively connected therewith, to move the latch to a latching position, there being a slot in the casing through which the latch may project, the latch being sufliciently long to project through said slot.

ISIDORE FRIED. 

